TURKEY has ignored the ultimatum issued by the US over a deal with Russia, further stirring tensions between Ankara and Washington.

Turkey’s President Recep Tayyip Erdogan refused to ditch the agreement struck with Moscow over the purchasing of S-400 air defence systems. Washington told Turkey in September 2018 the precondition for buying American-made Patriot air defence systems was refusing to buy Moscow’s S400s. But in a clear snub to the US, Turkey announced the deal has been finalised.

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Turkey's President Erdogan told the US 'we don't need permission' to buy from Moscow (Image: GETTY)

He said: “Turkey had a choice to make, a sovereign decision to make.

“But clearly Turkey bringing a Russian anti-aircraft, anti-missile system into a NATO country, we cannot integrate that into NATO.

“Yes, it does concern us and we do not recommend that.”

It is unlikely the deal between the US and Turkey will go through after the purchasing of the Russian S-400s also because this missile system can’t operate together with the Patriot system, according to experts.

Ankara’s Foreign Minister Mevlut Cavusoglu (Image: GETTY)

Turkey, which hopes to buy from Washington F-35 jets, could see the US pulling that deal as well, as theseaircraftsdon’t work along with the S-400, said Tim Ash, a senior emerging markets strategist at Bluebay Asset Management.

He explained: "Turkey cannot buy both. I think the U.S. will pull both the Patriot sale and F-35 deal if Turkey goes along with the S-400.

"Net-net, I think the news about Patriot is still a positive, as it shows the US and Turkey are talking and moving back closer together.

“That said, the Turks might be trying to drive too hard a bargain, and might end up with nothing as a result."